Dab tsi yog qhov txawv ntawm ib txheej ntawv khob thiab ob txheej ntawv khob?

Ib txheej ntawv khob yog ib hom ntawv khob pov tseg, tseem hu ua ib sab coated ntawv khob. Nws yog txheej hauv lub khob ntawv uas muaj PE txheej txheej. Ib txheej khob feem ntau yog siv los tuav cov dej haus, ua kom yooj yim rau tib neeg haus. Ib txheej ntawv khob yog tsim los ntawm cov zaub mov qib ntoo pulp ntawv thiab zaub mov qib PE zaj duab xis. Ob chav txheej ntawv khob, raws li lub npe qhia, xa mus rau cov ntawv khob uas muaj ob txheej txheej, nrog ob txheej. Qhov zoo ntawm ob-txheej ntawv khob yog zoo dua li ib-txheej ntawv khob. Lub sij hawm siv ntawm ob-txheej ntawv khob kuj ntev dua li ntawm ib txheej ntawv khob. Nws kuj tseem siv tau los tuav cov dej kub, xws li kas fes kub.

Txhawm rau nthuav dav daim ntawv thov ntawm cov khob ntawv, hauv xyoo 1940, cov kab ntawv ncaj nraim ob-txheej khob khob tau qhia rau lub khw. Cov khob ntawv no tsis yog yooj yim nqa xwb, tab sis kuj tuaj yeem tuav cov dej kub. Tom qab ntawd, cov chaw tsim khoom tau coated latex rau ntawm cov ntawv khob no kom npog cov ntawv khob tsis hnov ​​tsw thiab txhim khu kev tiv thaiv ntawm cov khob ntawv. Ib txheej txheej wax coated khob kho nrog latex txheej yog dav siv los tuav kas fes kub. Lub khob ntawv ob txheej, suav nrog lub hauv paus thiab ob txheej txheej ntawv khob lub cev muaj li ntawm ib txheej txheej ntawm daim ntawv khob lub cev thiab txheej txheej ntawm daim ntawv khob lub cev. Sab hauv los yog sab nrauv ntawm txhua txheej ntawm daim ntawv khob lub cev yog muab nrog qhov tsis sib xws qhov cuab lub zog, thiab qhov saum npoo uas muaj qhov tsis sib xws ntawm cov pob qij txha yog concave thiab convex. Lub puab txheej ntawm daim ntawv khob lub cev thiab txheej txheej ntawm daim ntawv khob lub cev yog kaw thiab adhered rau ib leeg.